how do i practice my music to be as good as this person? i can usually pick out melody by ear, albeit not as correct, so i try one by one... so the basic goal now is to hit the right note as precisely everytime, but even i practice or repeat the same song for hours i dont seem to improve nor understand anything... despite knowing abunch of chords by heart and theories... i still dont play music very well, so i wonder what is missing?

Naturally the way to play this is to get the melody and then embelish it, if i am not wrong, but this embelishments i do tend to fail too whenever dissonant sounds involved, like minor second.

So i guess the goal now is,
a. knowing what chord to play and why, with melody is a guide
b. to play that as vibrantly as possible, with melody as concern, meaning to make some reasoning why chord changes to another chord and sound better than the others

that's it i guess. a simple training and study to understand more about good piano playing....